Mitsubishi MSH-18NV- Manuals

6 MSH-18NV - E4 MUH-18NV - E4 MODEL WIRING DIAGRAM MODEL WIRING DIAGRAM INDOOR UNIT OUTDOOR UNIT CIRCUIT BREAKER N 2 12VDC L 50Hz CORD POWER SUPPLY ~/N 220-240V F11 NR1 1 TRANS HIC1 12VDC 220-240V~ DSAR BRN GRN/YL W LD1 DISPLAY P.C.BOARD RECEIVER P.C.BOARD 3 3 101 102 CN CN 1 TO OUTDOOR UNIT CONNECT...

7 REFRIGERANT SYSTEM DIAGRAM 6 MSH-18NV - E4 MUH-18NV - E4 INDOOR UNIT OUTDOOR UNIT Indoorheatexchanger Room temperaturethermistorRT11 Refrigerant pipe [ 15.88 (Option) Flared connection Flared connection Indoor coil thermistor RT12 Refrigerant pipe [ 6.35 (Option) Stop valve Strainer Checkvalve Cap...

8 11.2 7.2 8.2 9.1 10.1 12.2 MSH-18NV - E4 7 The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,since operating conditions vary according to the areas where these units are installed. The following information has beenprovid...

9 28.0 25.9 23.7 21.6 19.4 17.2 15.1 12.9 MSH-18NV - E4 NOTE:The above curves are for the heating operation without any frost. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENTCOOL operation 1 1 Both indoor and outdoor unit are under the same temperature/humidity condition. 2 2 Air flow should be set at...

10 MICROPROCESSOR CONTROL 8 Once the operation mode are set, the same operation modecan be repeated by simply turning the OPERATE/STOP(ON/OFF) button ON.Indoor unit receives the signal with a beep tone.When the system turns off, 3-minute time delay will operate toprotect system from overload and com...

11 Model COOL mode of "I FEEL CONTROL" DRY mode of "I FEEL CONTROL" HEAT mode of "I FEEL CONTROL" Initial room temperature Initial set temperature 26 : 26 : or more 25 : to 26 : less than 23 : 23 : to 25 : 24 : Initial room temperature minus 2 : Initial room temperature minus...

Difference between roomtemperature and set temperatureduring operation. 1deg. 1.7deg. 2deg. 4deg. 13 — HEAT mode of “I FEEL CONTROL” — 1. Indoor fan speed control (1) In AUTO the fan speed is as follows. Set temperature minus room temperature: 2 degrees or more ······································...

15 8-2. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. Operation Indicator lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with the OPERATION SELECT button. (3) Press the TEMPERATURES button. (TOO WARM or TOO COOL button) to selectthe desired temperature.The setti...

17 (5) Dew prevention During COOL or DRY operation at vane Angle 4 or 5 when the compressor cumulative operation time exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention. (6) SWING MODE ( ) By pressing the SWING button ( ) the horizontal vane swings vertically. The rem...

PROGRAM TIMER (Example 1) The current time is 8:00 PM. The unit turns off at 11:00 PM, and on at 6:00 AM. • The OFF timer and ON timer can be used in combination.• “ ” and “ ” display shows the order of the OFF timer and ON timer operation. (Example 2) The current time is 11:00 AM. The unit turns on...

19 9 SERVICE FUNCTIONS 9-1. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JP607 and R853 on the outdoor deicer P.C. board, defrosting mode can be accomplishedregardless of the defrost interval restriction. See page 29.Defrost thermistor RT61 must read below -3°C. 9-2. CHAN...

20 When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed arememorized by the indoor electronic control P.C.board. The “AUTO RESTART FUNCTION” sets to work the moment powerhas restored after power failure.Then, the unit will restart auto...

21 10 TROUBLESHOOTING 10-1. Cautions on troubleshooting 1. Before troubleshooting, check the following:(1) Check the power supply voltage.(2) Check the indoor/outdoor connecting wire for mis-wiring.2. Take care the following during servicing.(1) Before servicing the air conditioner, be sure to first...

23 1. troubleshooting check table Operation Indicator ❈ Before taking measures, make sure that the symptom reappears, for accurate troubleshooting. Self check table NO. 1 2 3 4 Abnormal point Mis-wiring Serialsignal Indoor coilthermistor Roomtemperaturethermistor Indoor fanmotor Defrostthermistor In...

24 Measure the resistance between the terminals with a tester.(Coil wiring temperature10°C ~ 30°C) Compressor Room temperaturethermistor 2. Trouble criterion of main parts Part name Indoor coilthermistor Indoor fanmotor Motor part Sensor part Outdoor fanmotor Vane motor Check method and criterion Me...

25 Yes Yes Check of indoor fan motor A Check of remote controller and receiver P.C. board B Indoor fan does not operate. Repair the indoor fan motor. Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board.Measure resistance between lead wires No.1 and No.4 and then No...

OPERATING PROCEDURE 30 11 DISASSEMBLY INSTRUCTIONS 11-1. MSH-18NV - INDOOR UNIT E4 (1) (2) 1 Slide the sleeve. 2 Pull the terminal while pushing the locking lever. 1 Hold the sleeve, and pull out the terminal slowly. In the case of terminal with lock mechanism, detach the terminal as shown below. &l...

31 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box (1) Remove the front panel. (Refer to 1)(2) Remove the electrical cover.(3) Disconnect the connector of the indoor coil thermistor.(4) Disconnect the motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronicc...

32 OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screws of the cabinet.(2) Hold the down of the cabinet on the both side to remove the cabinet. 2. Removing the deicer P.C. board (1) Remove the service panel and the cabinet.(2) Disconnect all the connectors and the terminals on th...

33 OPERATING PROCEDURE PHOTOS 3. Removing the outdoor fan motor (1) Remove the cabinet. (Refer to 1)(2) Disconnect the connector remove the clamp of fan motor lead wire. (3) Remove the propeller nut and remove the propeller fan.(4) Remove screws securing the fan motor. 4. Removing the compressor (1)...

34 12 PARTS LIST Symbol in Wiring Diagram Q'ty/unit 3PCS/SET Remarks Part No. NO. Part Name MSH-18NV- 1 2 3 4 5 6 7 FRONT PANEL(WH) GRILLE(WH) BOX(WH) AIR FILTER INSTALLATION PLATE SCREW CAP(WH) LAMP PANEL(WH) (WH) E4 1 1 1 2 1 3 1 E02 138 000 E02 138 010 E02 143 234 E02 141 100 E02 141 970 E02 143 ...

35 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NO. E02 143 235 E02 143 040 E02 141 702 E02 141 300 E02 001 505 E02 138 395 E02 444 452 E02 141 302 E02 141 303 E02 138 329 E02 141 509 E02 198 375 E02 336 385 E02 141 468 E02 001 504 E02 138 307 E02 138 308 E02 127 382 E02 205 381 E02 138 383 NO...

37 Deodorizing filter (Gray sponge type) , , , Air cleanig filter (White bellows type) 13-1. AIR CLEANING FILTER ● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. ● Normal life of AIR CLEANING FILTER is 3 months. However, when it becomes dirty, replace i...

New publication, effective Apr. 1999Specifications subject to change without notice. C C Copyright 1999 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Issued in Apr. 1999. No.OB229 REVISED EDITION-A 294Issued in Jan. 1999. No.OB229 305Printed in Japan HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8...